Did some research in the W124 Service CD-ROM.

Read up on section: 42-0720 Brakes: ABS: Electric Test Program.

Pulled the ABS solenoid valve relay (42-0710) (silver-colored "ice-cube" relay) and tested contacts 30 & 30C for a faulty diode.

Sure enough, bad diode, got a new relay for $33, and all is fine (MB pn# 001.542.6719).

I will try and open up the bad relay and install a new diode. . .

BTW: this relay is DIFFERENT than the other "ice-cube" silver relays which do NOT have a diode between contacts 30 & 30C.


:-) neil
1988 360TE AMG
1993 500E